2004 Aston Martin V12 Vanquish Zagato Roadster Concept

One-off concept car built by Zagato. Comes with a hard top for winter and for warmer days of the year, its place is taken by a transparent hardened glass and a soft cover which can be easily mounted and held in the luggage compartment when not in use. (seriouswheels.com)

(Photos from autogespot.com & supercars.net)

1963 Iso Grifo A3/L Bertone Prototype

Concept car from Italian car company Iso Rivolta. Engineered by ex-Ferrari engineer Giotto Bizzarrini. Fitted with a V8 Corvette engine. Body by Giorgetto Giugiaro at Bertone. This prototype led to the successful Iso Grifo GL (1963-74). (Wikipedia)

Renzo Rivolta also showed a one-off Grifo A3/L Spyder at the 1963 Geneva auto show.

(Photos from supercars.net, autowp.ru, mycarquest.com & flickr.com)